系统内冗余或重复数据的度量，表明存储和潜在性能问题效率低下。
1 DF = 0.75 PB
1 PB = 1.333 DF
例子:
将15 数据保真度冗余转换为奇偶校验的冗余：
15 DF = 11.25 PB
| 数据保真度冗余 | 奇偶校验的冗余 |
|---|---|
| 0.01 DF | 0.008 PB |
| 0.1 DF | 0.075 PB |
| 1 DF | 0.75 PB |
| 2 DF | 1.5 PB |
| 3 DF | 2.25 PB |
| 5 DF | 3.75 PB |
| 10 DF | 7.5 PB |
| 20 DF | 15 PB |
| 30 DF | 22.5 PB |
| 40 DF | 30 PB |
| 50 DF | 37.5 PB |
| 60 DF | 45 PB |
| 70 DF | 52.5 PB |
| 80 DF | 60 PB |
| 90 DF | 67.5 PB |
| 100 DF | 75 PB |
| 250 DF | 187.5 PB |
| 500 DF | 375 PB |
| 750 DF | 562.5 PB |
| 1000 DF | 750 PB |
| 10000 DF | 7,500 PB |
| 100000 DF | 75,000 PB |
规则